Circuit for driving liquid crystal panel
US5251051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jul 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for driving a liquid crystal panel includes an A/D converter for converting image data to digital data, a shift register for generating horizontal scanning signals, a capacitor group formed of capacitors the number of which corresponds to the number of bits of digital data, a selector for selecting none or at least one capacitor from among the capacitor group on the basis of horizontal scanning signals and digital data, a power-supply section for supplying an electric charge to each capacitor, first switch sections for charging an electric charge to selected capacitors only in every horizontal synchronization period, and second switch sections for connecting all capacitors to their corresponding signal electrodes S in every horizontal synchronization period. Even if the liquid crystal panel is formed into a large screen, neither is its parts mounting surface increased considerably, nor do the costs increase. In addition, a display having a high resolution can be realized with a simple construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.